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rgba: Use pango_color_parse_with_alpha

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Use this newly exported pango function, so we
can support hex colors with alpha like #rrggbbaa.

Fixes: #2931
This commit is contained in:
Matthias Clasen 2020-08-02 23:23:49 -04:00
parent 15325fe546
commit 1f3327d326
2 changed files with 17 additions and 6 deletions
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15
gdk/gdkrgba.c
View File

@ -170,19 +170,21 @@ parse_rgb_value (const char *str,
* - A standard name (Taken from the X11 rgb.txt file).
* - A hexadecimal value in the form “\#rgb”, “\#rrggbb”,
* “\#rrrgggbbb” or ”\#rrrrggggbbbb”
* - A hexadecimal value in the form “\#rgba”, “\#rrggbbaa”,
* or ”\#rrrrggggbbbbaaaa”
* - A RGB color in the form “rgb(r,g,b)” (In this case the color will
* have full opacity)
* - A RGBA color in the form “rgba(r,g,b,a)”
*
* Where “r”, “g”, “b” and “a” are respectively the red, green, blue and
* alpha color values. In the last two cases, “r”, “g”, and “b” are either integers
* in the range 0 to 255 or percentage values in the range 0% to 100%, and
* a is a floating point value in the range 0 to 1.
* alpha color values. In the last two cases, “r”, “g”, and “b” are either
* integers in the range 0 to 255 or percentage values in the range 0% to
* 100%, and a is a floating point value in the range 0 to 1.
*
* Returns: %TRUE if the parsing succeeded
*/
gboolean
gdk_rgba_parse (GdkRGBA *rgba,
gdk_rgba_parse (GdkRGBA *rgba,
const char *spec)
{
gboolean has_alpha;
@ -207,18 +209,19 @@ gdk_rgba_parse (GdkRGBA *rgba,
else
{
PangoColor pango_color;
guint16 alpha;
/* Resort on PangoColor for rgb.txt color
* map and '#' prefixed colors
*/
if (pango_color_parse (&pango_color, str))
if (pango_color_parse_with_alpha (&pango_color, &alpha, str))
{
if (rgba)
{
rgba->red = pango_color.red / 65535.;
rgba->green = pango_color.green / 65535.;
rgba->blue = pango_color.blue / 65535.;
rgba->alpha = 1;
rgba->alpha = alpha / 65535.;
}
return TRUE;

8
testsuite/gdk/rgba.c
View File

@ -57,6 +57,14 @@ test_color_parse (void)
res = gdk_rgba_parse (&color, "rgb(0,0,0)");
g_assert (res);
g_assert (gdk_rgba_equal (&color, &expected));
expected.red = 0.0;
expected.green = 0x8080 / 65535.;
expected.blue = 1.0;
expected.alpha = 0x8888 / 65535.;
res = gdk_rgba_parse (&color, "#0080ff88");
g_assert (res);
g_assert (gdk_rgba_equal (&color, &expected));
}
static void